Amplifier for telephones.



'R'. D. HATCH.

AMPLIFIER FOR TELEPHONES.

APPLICATION FILED DEC-7.1914- Patente Apr. 27, 1915.

attain;

ill? d HATCE jipecirlcetion of Letters'fiatent.

Patented Apr. 2'33, 1915.

Application tiled. BOOQEQEJQI' Z, 191 Serialfi'c. 875,8?8.

To allwkomitmcy concern:

Be it known that 1, Rose D. Heron, a citizen of the United States,residing Meniphis, in the county of Shelby and State of Tennessee. haveinvented certain new and useful lmbrovernents in Amplifiers for Tolephones; and I do hereby declare the follow ing to be a lull, clear, andexact description of invention, such as will enable others skilled inthe art to which it appertains to make and use the some, reference beinghad to the accompanying drawings, and. to the letters and figures ofreference marked thereon, which form a part oil this specification.

This invention relates to new and nsci ul improvements in amplifiers orsound int/en sifying devices for attachment to receivers of telephonesand consists essentially in the provision of a device cl this natureattaclied to the receiver and in the provis on of a lever-operatedmechanism for raising the receiver-holding iorl: when is desired to usethe telephone.

My invention consists of various details of construction, combinationsand arrangements. of parts which will be hereinafter fully described,shown in the accompanying drawings and then speci cally defined in theappended claims.

l illustrate my invention in the accompanying drawings, in which:

Figure 1 is a front elevation showing the application of the invention.Fig. 2 is a sec tional view through the sound amplifier on line 2-2 ofFig. l, and Fig. 3 is a detail view on line 3-3 of Fig. 1 showing themeans for raising the receiver-holding menr ber.

Reference now being bad to the details of the drawings by letter, Adesignates a funnel-shaped horn having a contracted {)Oi'ilOil B towhich a clamping member C is fastened and which in turn is pivotallymounted upon a pin D secured to the bar E.

F is a bolt which passes through one or another of the apertures formedin said bar and. cylindrical or other-shaped Washer, I datol by letterI, is mounted upon the an is adapted to the "forks L l usual receiverholder, and a thumb designated by lette T s mounted. npon end of lC Oloi claoto clamp the forked s the rccei: er 1 against said cylir zcalWasher ace the bar to holdthe later in an adjusted position. #Saidhornhas a flaring end with resilient fingers U secured thereto and whichare adapted to spring over the marginal edge of a receiver and has acentral funnelshapcdcxtension'ltl which extends to a position adjacentto the opening leading to the diaphragm of the receiver.

A lever, designated by letter Q, is provided with a forked end Q adaptedto engage the shank portion of the receiver holder and is pivotallymounted upon a pin it fixed to the bar 8 which in turn. has a clampingmember T secured thereto for engagement about the circumference of thetelephone at any suitable location and which is held in position bymeans of a screw S passing through registering apcrturesin the clampingmember.

in operation,'when the device is applied to a receiver in the mannershown and when it is desired to use the telephone, the operator hyswinging the lever to an upright position will cause the receiver holderto be raised and the circuit opened for the use of the instrument. thevibrations coming from. the receiver being intensified and the soundbeing sufficiently amplified so that the message may be heard at adistance without the necessity of holding the receiver to the ear.

When it is desired to cut the telephone, the operator by swinging thelever may allow the receiver holder to return by gravity to its normalposition.

By the provision of the adjustable means, it will be noted that theamplifier may be held in various positions with relation to thetelephone receiver holder, being clamped in position thereon and, ifdesired, the device may be easily and quickly detached from thereceiver, as will be readily understood.

What I claim to hen w is:

1. A sound intensifier for telephones comprising a horn with acontracted portion and a daring funnelshaped part, a central conical,open-ended tubular extension within said flaring end with one endadapted to be positioned adjacent to the diaphragm of the receiver, asupport for holding the horn upon a receiver holder, a clamping member,a pin pivotally connected thereto, an apertnred bar secured to said pin,a bolt carried by the washer carried by the bolt, a upon the latter andaffording means is hereby the be held difilerent ad Elli? justedpositions upon a, forked telephone receiver, and means for raising andlowering the receiver holder.

In combination with a telephone, an amplifier for attachment to thereceiver of a telephone, a swivell y mounted clamping member fixed tosaid amplifier, aber secured to said clamping member and designed to beadjustably held to the forked end of c telephone receiver holder, and alever for rais mg and lowering the receiver holder.

' .3. In combination with a telephone, an amplifier'for attachment tothe receiver of a telephone, a swivelly mounted clamping member securedto the amplifier, a'bar fastened to the clamping member, a receiverholder and support therefor, a clamping member engaging said support andprovided with an arm, a lever pivotally mounted upon said arm and havinga forked end for on gagement with the receiver holder, the latter beingconnected to said bar.

In testimony whereof I hereunto aflix my signature in presence of twowitnesses.

ROSA D. HATCH. Witnesses J. E. R. RAY, FRANKLIN H. Houon.

